8173876: Fast precise scrolling and DeltaAccumulator fix for macOS Sierra 10.12.2
Reviewed-by: serb, alexsch

4419271: Provide support for scrolling-mechanisms of non-mouse input-devices
Reviewed-by: alexsch, malenkov

8166591: [macos 10.12] Trackpad scrolling of text on OS X 10.12 Sierra is very fast (Trackpad, Retina only)
Reviewed-by: malenkov, serb